package com.mach.platform.utils;

import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

/**
 * @author Anonymous
 * @Description:
 * @Package: com.mach.platform.utils
 * @time 2018/04/06 19:15
 */
public class JsonUtils {

	/**
	 * 实体转为 Map，可以过滤 某些字段
	 *
	 * @param obj
	 * @param ignoreProperties
	 * @return
	 */
	public static Map<String, Object> transBean2Map (Object obj, String[] ignoreProperties) {

		if (obj == null) {
			return null;
		}
		Map<String, Object> map = new HashMap<String, Object>();
		try {
			BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
			PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
			for (PropertyDescriptor property : propertyDescriptors) {
				String key = property.getName();

				// 过滤class属性
				if (!key.equals("class")) {
					// 得到property对应的getter方法
					Method getter = property.getReadMethod();
					Object value = getter.invoke(obj);

					map.put(key, value);
				}

			}
		} catch (Exception e) {
			System.out.println("transBean2Map Error " + e);
		}

		if (ignoreProperties.length > 0) {

			for (String propertyName : ignoreProperties) {
				if (map.containsKey(propertyName)) {
					map.remove(propertyName);
				}
			}
		}

		return map;

	}
}
